Electrical help required

[Surasak]

2 X 12 volt out put units. One is 220V 50Hz to drive an LED computer screen. Out put is 12 V 400 mA. Other one is 110v 60 Hz  Out put 12V  1.5amp  for Yamaha NP 31 Keyboard, US standard.

I'm not very up on electrics so am not sure if the LED screen out put will do any damage to the NP31. Or even if it is capable of powering the NP31? 

I'm trying to avoid buying a step down transformer, so if any of you gents can throw some light on this, I would be very grateful.

Attached photos my help?

Surasak. 

[Crossy]

The 400mA unit will NOT power the NP31. Actually it probably will, but you'll overload it resulting in its early death.

 

Take the Yamaha unit to one of the electronic malls (in Bangkok that would be Fortune Town or Pantip Plaza) and you should be able to get a 220V version. Shouldn't be silly money.

[sometimewoodworker]

To amplify a little, your 220V unit is rated at 400mA or 0.4A output 

The Yamaha one is rated at 1.5A or 1,500mA output 

 

so as Crossy said you need to buy a new PSU, it will be much cheaper than a good step down transformer.